| abstract |
An ultrasonic device for atomizing a liquid by the acoustic vibration generated with a vibrating plate (2) being mounted to a piezoelectric vibrator (1). The piezoelectric vibrator (1) consists of a piezoelectric ceramic and a pair of electrodes (P,Q) on the both end surfaces perpendicular to the thickness direction of the piezoelectric ceramic (30). The vibrating plate (2) has a lot of holes (22), and the area of the one of the openings of the hole is different with the area of the other. The piezoelectric vibrator (1) is efficiently vibrated under an application of an alternating current signal, whose frequency is almost equal to the resonance frequency of the piezoelectric vibrator (1). This vibration is transmitted to the vibrating plate (2), so that the vibrating plate (2) is also vibrated. A liquid existing at the part of the vibrating plate (2) is atomized through a lot of holes (22) formed in the vibratina olate (2). |